﻿//  Copyright 2019 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

namespace NtCoreLib.Ndr.Marshal;

/// <summary>
/// Class to represent an NDR interface pointer.
/// </summary>
public struct NdrInterfacePointer : INdrConformantStructure
{
    /// <summary>
    /// The marshaled interface data.
    /// </summary>
    public byte[] Data { get; set; }

    /// <summary>
    /// Constructor.
    /// </summary>
    /// <param name="data">The marshaled interface data.</param>
    public NdrInterfacePointer(byte[] data)
    {
        Data = data;
    }

    int INdrConformantStructure.GetConformantDimensions()
    {
        return 1;
    }

    void INdrStructure.Marshal(INdrMarshalBuffer marshal)
    {
        NdrMarshalUtils.CheckNull(Data, "Data");
        marshal.WriteInt32(Data.Length);
        marshal.WriteConformantByteArray(Data, Data.Length);
    }

    void INdrStructure.Unmarshal(INdrUnmarshalBuffer unmarshal)
    {
        unmarshal.ReadInt32(); // length.
        Data = unmarshal.ReadConformantByteArray();
    }

    int INdrStructure.GetAlignment()
    {
        return 4;
    }
}
